"David has been suspended indefinitely," an MSNBC spokesperson said Tuesday morning.

It was revealed last week that Shuster had filmed a pilot for CNN; at the time, the network had said he would be "punished appropriately." After getting "ripped a new one" by boss Phil Griffin by phone over the weekend, Shuster met with Griffin in the office Monday.

Shuster also came under fire from the network after a tweet he sent to conservative activist James O'Keefe. "@JamesOKeefeIII a) you are not a journalist b) the truth is you intended to tap her phones c) it's a felony d) you will go to prison," he wrote. The network deemed that tweet "inappropriate" and muzzled him on Twitter soon thereafter.